52285440 has 208 divisors, whose sum is σ = 179284608. Its totient is φ = 12976128.

The previous prime is 52285423. The next prime is 52285483. The reversal of 52285440 is 4458225.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 52285398 and 52285407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1413102 + ... + 1413138.

Almost surely, 2^52285440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52285440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89642304).

52285440 is an abundant number, since it is smaller than the sum of its proper divisors (126999168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52285440 is a wasteful number, since it uses less digits than its factorization.

52285440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 52285440 is about 7230.8671679128. The cubic root of 52285440 is about 373.9328236846.

It can be divided in two parts, 52285 and 440, that added together give a palindrome (52725).

The spelling of 52285440 in words is "fifty-two million, two hundred eighty-five thousand, four hundred forty".